简介：Inthispaper,wepresentahighspeedautofocussystemformicrosystemapplicationsanddesignalook-up-tablebasedautofocusingalgorithmforapplicationswhenatargetobjectisalwaysvisible,e.g.,manufacturingpartswithalignmentfiducials.Weperformanevaluationof24focusmeasurestoverifythatwhichfocusmeasureisthebestforthelook-up-tablebasedmethod.Fromtheevaluation,wefindthattheChebyshevmoments-basedfocusmeasure(CHEB)isthemostsuitable.Furthermore,wealsodevelopalook-up-tablebasedautofocussystemthatusesCHEBasthefocusmeasure.Intrainingphase,weofflineconstructatablefromtrainingimagesofanobjectthatarecapturedatseverallensdistances.Eachentryoftableconsistsoffocusmeasurecomputedfromimageandlensdistance.Inworkingphase,givenaninputimage,thealgorithmfirstcomputesthefocusmeasureandthenfindsthebestmatchfocusmeasurefromthetableandlooksupthecorrespondinglenspositionformovingitintothein-focusposition.Ouralgorithmcanperformautofocusingwithinonly2stepsoflensmoving.Theexperimentshowsthatthesystemcanperformhighspeedautofocusingofmicroobjects.

简介：ＲａｄａｒＳｙｓｔｅｍＥｎｇｉｎｅｅｒｉｎｇ￥ＤａｌｅＲ．Ｂｉｌｌｅｔｔｅｒ（ＲａｙｔｈｅｏｎＣｏｍｐａｎｙ，Ｍａｓｓａｃｈｕｓｅｔｔｓ．ＵＳＡ）ＷＨＡＴＩＳＲＡＤＡＲＳＹＳＴＥＭＥＮＧＩＮＥＥＲＩＮＧ？Ａｎｏｒｇａｎｉｚａｔｉｏｎｄｅｓｉｒｅｄｔｏ...

简介：Avirtuallabsystemisthesimulationofrealdevicesandexperimentsusingcomputerandnetworktech-nology.Itcanmakeusersdoexperimentseasily,observeexperimentphenomenaandresultsthroughtheremotetermi-nal.Consequently,userscangetfinalresultstoverifyrelativetheory.Thearticleanalysesthefeaturesofvirtuallabsystems.Arealvirtuallabsystemnamed'MultimediaVirtualLabforDigitalCircuitLogicDesign(MVLDCLD)'whichhasbeendevelopedbytheauthorsandtheirgroupisalsopresented.

简介：Toolmanagementisnotasingle,simpleactivity,itiscomprisedofacomplexsetoffunctions,especiallyinaflexiblemanufacturingsystem(FMS)environment.Theissuesassociatedwithtoolmanagementincludetoolrequirementplanning,toolreal-timescheduling,toolcribmanagement,toolinventorycontrol,toolfaultdiagnosis,tooltrackingandtoolmonitoring.Inordertomaketoolsflowinto/outofFMSefficiently,thisworkisaimedtodesignaknowledge-baseddecisionsupportsystem(KBDSS)fortoolmanagementinFMS.Firstlyanoverviewoftoolmanagementfunctionsisdescribed.ThenthestructureofKBDSSfortoolmanagementandtheessentialagentsinthedesignofKBDSSarepresented.FinallytheindividualagentsofKBDSSarediscussedfordesignanddevelopment.

简介：Thispaperproposesanewneuralfuzzyinferencesystemthatmainlyconsistsoffourparts.Thefirstpartisabouthowtouseneuralnetworktoexpresstherelationwithinafuzzyrule.Thesecondpartisthesimplificationofthefirstpart,andexperimentsshowthatthesesimplificationswork.Onthecontrarytothesecondpart,thethirdpartistheenhancementofthefirstpartanditcanbeusedwhenthefirstpartcannotworkverywellinthefuzzyinferencealgorithm,whichwouldbeintroducedinthefourthpart.Finally,thefourthpart"neuralfuzzyinferencealgorithm"isbeenintroduced.Itcaninferencethenewmembershipfunctionoftheoutputbasedonpreviousfuzzyrules.Theaccuracyofthefuzzyinferencealgorithmisdependentonneuralnetworkgeneralizationability.Evenifthegeneralizationabilityoftheneuralnetworkweusedisgood,westillgetinaccurateresultssincethenewcomingrulemaynotberelatedtoanyofthepreviousrules.Experimentsshowthisalgorithmissuccessfulinsituationswhichsatisfytheseconditions.

简介：Ahybridapproachforfuzzysystemdesignbasedonclusteringandakindofneurofuzzynetworksisproposed.Anunsupervisedclusteringtechniqueisfirstlyusedtodeterminethenumberofif-thenfuzzyrulesandgenerateaninitialfuzzyrulebasefromthegiveninput-outputdata.Then,aclassofneurofuzzynetworksisconstructedanditsweightsaretunedsothattheobtainedfuzzyrulebasehasahighaccuracy.Finally,twoexamplesoffunctionapproximationproblemsaregiventoillustratetheeffectivenessoftheproposedapproach.

简介：ＰｒｏｌｏｇｔｏｔｈｅＳｅｃｔｉｏｎｏｎＲａｄａｒＳｙｓｔｅｍＥｎｇｉｎｅｅｒｉｎｇ￥／／ＩｎｔｈｅＥｎｇｌｉｓｈｌａｎｇｕａｇｅｗｅｈａｖｅａｎｅｘｐｒｅｓｓｉｏｎｔｈａｔｓａｙｓｉｔｉｓｐｏｓｓｉｂｌｅ＂ｔｏｌｏｓｅｓｉｇｈｔｏｆｔｈｅｆｏｒｅｓ...

简介：ＡｎＩｎｔｅｌｌｉｇｅｎｔＤｅｓｉｇｎｏｆＥｌｅｃｔｒｏｎＬｅｎｓＳｙｓｔｅｍ￥ＬｅｔＷｅｉ；ＴｏｎｇＬｉｎｓｕ＆ＷｕＳｈｅｎｇｌｉ（ＥｌｅｃｔｒｏｎｉｃＥｎｇｉｎｅｅｒｉｎｇＤｅｐａｒｔｍｅｎｔｏｆＳｏｕｔｈｅａｓｔＵｎｉｖｅｒｓｉｔｙ，Ｎａｍｉｎ...

简介：DiscreteFourierTransform(DFT)basedmultiple-inputmultiple-outputOrthogonalFrequencyDivisionMultiplexing(MIMO-OFDM)isthefocusofwirelesscommunication,whichusescyclicprefixestoreducetheISI.Toimprovethespectrumefficiencyandsystemperformance,ComplexWaveletPacketTransform(CWPT)basedOFDMisusedtorealizetheMIMO-OFDMsystem.Forthegoodpropertyofcomplexwaveletpacketfunction,theCWPTbasedMIMO-OFDMsystemisbetterthantheDFTbasedMIMO-OFDMsystem,buttheCWPTbasedMIMO-OFDMschemehassomeadditionalcomplexity,andsimulationresultsshowthatthenewsystemcanimprovethesystemperformance.

简介：ＴｈｅＥｌｅｃｔｒｏｍａｇｎｅｔｉｃＣｏｍｐａｔｉｂｉｌｉｔｙａｎｄＤｉｓｔｒｉｂｕｔｉｏｎｏｆＡｎｔｅｎｎａＳｙｓｔｅｍ￥Ｂ．ＦＷａｎｇ；Ｓ．Ｚ．ａｄｎｓ＆Ｙ．Ｌ．Ｙａｏ（Ｄｅｐｔ．ｏｆＥｌｅｃｔ．Ｅｎｇ．，ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＡ...

简介：Greysequencegenerationcandrawoutanddevelopimpliedrulesoftheoriginaldata.Differentkindsofgenerationmethodsweresummarizedandclassifiedintotwotypes:partialgenerationandwholegeneration.Theaveragegenerationandstepwiseratiogenerationisdisussed,thepreferencegenerationisregardasaspecialcaseofproportionaldivisionbasedonanalysisgeometrictheory,proposeanideaofusingconcaveandconvexstatusofdiscretedatatodeterminethegenerationcoefficient.Basedonthestepwiseandsmoothratiogeneration,atendencyaveragegenerationisproposedandhaveacomparisonusingthedataprovidedinpaperslistedinthereferences.Thecomparisonprovesthatthenewgenerationisbetterthantheothertwogenerationsanderrorsareobviouslyreduced.

简介：Theautomaticdetectionoffacesisaveryimportantproblem.Theeffectivenessofbiometricauthenticationbasedonfacemainlydependsonthemethodusedtolocatethefaceintheimage.Thispaperpresentsahybridsystemforfacesdetectioninunconstrainedcasesinwhichtheillumination,pose,occlusion,andsizeofthefaceareuncontrolled.Todothis,thenewmethodofdetectionproposedinthispaperisbasedprimarilyonatechniqueofautomaticlearningbyusingthedecisionofthreeneuralnetworks,atechniqueofenergycompactionbyusingthediscretecosinetransform,andatechniqueofsegmentationbythecolorofhumanskin.Awholeofpictures(facesandnofaces)aretransformedtovectorsofdatawhichwillbeusedforlearningtheneuralnetworkstoseparatebetweenthetwoclasses.Discretecosinetransformisusedtoreducethedimensionofthevectors,toeliminatetheredundanciesofinformation,andtostoreonlytheusefulinformationinaminimumnumberofcoefficientswhilethesegmentationisusedtoreducethespaceofresearchintheimage.Theexperimentalresultshaveshownthatthishybridizationofmethodswillgiveaverysignificantimprovementoftherateoftherecognition,qualityofdetection,andthetimeofexecution.

简介：Anewauditorysystemmodelbasedonacombinationofphysiologicalandpsycho-logicalacousticdatahasbeenproposed.Thismodelconsistsofabankofnonuniformbandpassfilters,detectorsandmain-frequencychoosingmechanisms,theyactasbasilarmembranes,innerhaircellsandnervefibers,respectively.Combiningwiththeimprovedcriticalbandwidthpa-rameters,theinputtothismodelisanalogoustothepressureattheeardrum,andtheoutputofthismodelsimulatesvariousfeaturesofthefiringpattern.Thesynthesizerobtainstheresul-tantspeechbyuseofthesimpleaddingmethod.Computersimulationsshowthattheresultantspeechishighlyintelligibleandnatural.Theproposedmodeliscorrectandtheimprovementofthecriticalbandwidthparametersiseffective.

简介：ThehardwarestructureandsoftwarefunctionofintelligencedoormonitoringcontrolsystemsonInternetisexpounded.Theremotemanagingfunction,databasefunction,andtherealizationofdialingusersareintroduced.Theresetcardisinstalledtoimprovereliability.Thedesignofthesystemisreasonableandreliable.Resultsshowedthat10percentofthelineinvestmenthavebeencutoff.

简介：Autofluorescencespectrafromtheserumofhealthmanandcancerpatientshavebeenmeasuredandanalyzed.Twoobviouslyspectracharacteristicsoftheserumhavebeendiscussedindetail.Anovellasercancerdiagnosissystem(LCD-1)hasbeenestablishedandthediagnosisresultsarecomparedwithclinicalmethods.

简介：Theperformanceofmassivemultiple-inputmultiple-output(MIMO)systemislimitedbypilotcontamination.Toreducethepilotcontamination,uplinkanddownlinkprecodingalgorithmsareputforwardbasedoninterferencealignmentcriterion.Intheuplinkreceivingprocessing,thetargetfunctionalignsthepilotcontaminationandtheinterferencesignalstothesamenullspaceandacquiresthemaximalspacedegreeofthedesiredsignals.Theuplinkreceivingprecodingmatrixissolvedonmaximalsignaltointerferenceplusnoiseratio(SINR)criterionconsideringtheimpactofthepilotcontaminationonchannelestimations.Theuplinkreceivingprecodingmatrixisusedasthedownlinktransmittingprecodingmatrix.Exploitingthechannelreciprocity,itisprovedthat,iftheuplinkreceivingprecodingmatrixachievesmaximalSINR,theidenticalprecodingmatrixcanbeusedinthedownlinktransmissionandacquiresmaximalsignaltoleakageplusnoiseratio(SLNR).Simulationsshowthatthespectrumefficiencyoftheproposedalgorithmcanreachabout1.5timeshigherthanthatofpopularmatchedfiltering(MF)precodingalgorithm,andabout1.1timeshigherthanmulti-cellminimummeansquareerror(MMSE)precodingalgorithm.Theperformanceoftheproposedalgorithmcanbeimprovedapproximatelylinearlywiththeincreasingofthenumberofantennas.

简介：Thispaperisconcernedwithahighcharacteristicimageprocessingandrecognitionsystemthatisusedforinspectingreal-timeblemishes,streaksandcracksontheinnerwallsofhighaccuracypipes.Asaregulardetector,theBPneuralnetworkisusedforextractingfeaturesoftheimageinspectedandclassifyingtheseimages,ittakesfullyadvantageofthefunctionofartificialneuralnetwork,suchastheinformationdistributedmemory,largescaleself-adaptingparallelprocessing,highfault-tolerantabilityandsoforth.Besides,animprovedBPalgorithmisusedinthesystemfortrainingthenetwork,andmakingthelearningprocedureofthenetconvergestotheminimumofoverallsituationathighrate.

简介：Adynamicalsystemforcomputingtheellipticboundaryproblemispresented.Itisshownthattheproposedsystemisgloballyasymptoticallystable.Thesystemcanbesimulatedbyaneuralnetwork.Simulationresultsarevalidandsatisfactory.

简介：Aneasyandpracticalsystemoffeeblefluctuationofliquidelectricalconductivityisdescribed.Thesystem,whichincreasesaprecisiononthethreeordersmagnitudeascomparedwiththatoftherecentdomesticconductivitymeter,isusedtomeasurethefeeblefluctuationoftheconductivitybymeansofcompensationandcomparison,sothatitsolves,theproblemofmeasuringthefeeblefluctuation.

简介：PlentyofworkhavebeendoneonSpace-Timeprocessinginwhichmultipletransmit/receiveantennasareusedinconjunctionwithcodingtoexploitbothspatialdiversityandtimediversity.ConstantModeAlgorithm(CMA)isanefficientblindadaptiveMulti-UserDetection(MUD)algorithmforCDMAsystems.Inthispaper,weputforwardanovelreceiver,whichcombinesCMAblindadaptiveMulti-userDetectionwithSTBCtechnique,andcomparetheperformancesofthesystemusingdifferentCMalgorithmsincludingSDCMA(Steepest-DescentCMA),StandardLinearityConfineCMA(SLCCMA)andLeastSquaresCMA(LSCMA).Simulationshavebeendonewithmulti-pathRayleighchannel.